Window itbame



Jan; 27, 1931 H. G. KLoPP 1,790,428

WINDOW FRAME Filed Ap'ril 17. 1929 Heh/y fr Invcnlor A llorney Patented Jan. 27, `1931 PATENT OFFICE -YHENRY G. KLQPP, OF SPQKANE, WASHINGTON v WINDOW FRAME Applicatipn filed April 17,

My present inventon relates to improvements in window frames and the improvements are embodied in the construction of the frame, as it is fashioned at the factory,

for the purpose of accurate and convenient assembly of the parts of the frame on the job or at the place of thebuilding construction of which the frame is to form a i part. My invention involves particularly the construction of the pulley stilesrand the blind stops, the former being the side, up'- right rails of the frame, and the latter being Wooden strips that are secured to the stiles and co-operate with parting strips to form the groove in which the upper sash slides. n v

By the utilization and embodiment of my invention in the window frame, theV parts of the frame may be shipped to the job and there assembled with convenience and ac curacy; a weather. tight [joint between the pulley stile and the blind stop is insured; warping ofthe parts is prevented; and a permanently true groove is provided in which the sash may slide without binding. The parts may also be accurately assembled without the necessity for use of special'tools and also without necessity for skilled labor.

The invention consists in certain novel combinations and arrangements of parts'as will hereinafter be more fully set forth and claimed. In the accompanying drawings I have illustrated one complete example of the physical embodiment of my invention,

and a slight modification thereof, in which the parts are combined and arranged according to one mode I have thus far devised for the practical application of the principles of my invention.

4U Figure 1 lis a horizontal perspective view' in section at one side of a window frame, showing the improvements of my invention, it being understood that a similar construction is used at the other side of the frame. Figures 2 and 3 are sectionalviews of a portion of a pulley stile with wedge-shaped or dove-tail tongues and of a blind stopor strip having complementary grooves' in its 5 face.

V Figure 4 is a sectional view partlyin per- 1929. Serial No. 355,865.

spective o-f a portion of awindow frameA in Y whicha single tongue and groove are used; Figures 5 and 6 are sectional views showing respectively a portion of the pulley stile and a portion of the blind stop of Figure 4;.

In Figure l a sash rail-1 and the pane of glass 2 are shown toindicate a portion of the upper sash of a window which slides down land up as usual inthe groove provided therefor in the window frame.` The window frame comprisesrthe upright or vertical pulley stile 3, (onej used at each side-of 'the frame, `although only. one Vstile is herein shown), and the parting strip'flI 1s secured 'in usual manner in the groovey provided in theinner face of the stile.

The groovefor the upper sash is formed by the parting strip 4 and the overlapping v edge 5 of the blind stop 6,the latter being partly'covered by the outer casing 7 The .blind stop 6 Vis wider than the thickness of the pulley stile to provide the overlapping edge 5 for the sash, and a suitable number of nails 8 are used to secure the blind stop to the edge of the pulley stile.

F or use as guides in accurately assembling the parts,to secure a weather tight joint, and to interlock thek parts to. prevent warping, the edge of .the pulley stileiadj acent4 the blind stop is provided with a pair of spaced parallel tongues 9 and 10 that are dovetailshape or wedge-shaped jin` crossv section, and these tongues are fitted into complementary. grooves ll and 1.2 in the adjoining face of the blind frictional Contact of the sides ofthe tongues withv the side walls of the grooves and toV hold the adjoining faces ofthe pulley stile and the blind stop in close contact.A TheseV taper'- `forced intokthe grooves to insure maximum Y in.T sides of the ton ues and ta erin@r side Y walls-of the grooves also `insure a tight oint even though shrinkage should take place in either the stile orthe blind stop. i

The stile and blind Vstop'v are thus capable of being assembled with` accuracy, as the tongues and grooves act asV guides torinsure convenience and true alinement in assembling the parts.

In Figures 4t, 5, and 6 a slight modification is shown, wherein the stile 13 has a single t-ongue i4 and the blind stop l5 has a single complementary groove 16.

As thc grains of the stile and blind stop run in different directions, these parts themselves, together with the tongues and grooves, aid in stiilening the frame against warping, and in maintaining the sash-groove in true alinement, thus avoiding the danger ot binding to the sash.

ln the construction of window frames shown in the prior art, and in customary practice, the tongues and their complementary grooves have straight parallel sides, and the tree, outer edge of the tongue may be lat or rounded.

ln the manufacture and shipment of Window trames, for various reasons, the trames are shipped in knocked down condition, and in transit the 'frames and their parts are subjected to varying degrees of temperature. The absorptionA of moisture by the Wood swells or expands the Wood, while on the other hand, dry, warm, atmospheric conditions result in a shrinking of the wood parts.

Then when the parts of the knocked down trame are assembled, `it is frequently found that the tongues are warped, they have eX- panded, or they have contracted under atmospheric conditions. The walls of the grooves having been subjected to varying atmospheric conditions, also have been changed; and the result is that the tongues Will not fit the4 grooves; nor can a tight, weatherproof joint be made with these defective parts.

By the utilization of a tongue that is wedge shaped or clove-tail in cross section, and with the walls of the grooves of complementary formation, l find that the etlects of the varying atmospheric changes are nil, so far as the utility of the parts is concerned. With the dove-tail or wedge shaped tongue and groove the 'former can be forced into the latter and the parts drawn together by the use of a nail or nails.

As shown in Figure 4 the depth ot the groove may be greater than the thickness of the dove-tail or wedge-shaped tongue to compensate for a shrinking of the tongue, and yet permit the tongue to be driven or drawn into the groove to insure a tight and Weatherproof Y joint.

It will thus be apparent that the tighter the tongue is driven into the groove, the tighter and more'weatherproot will be the joint, and this tightness, or rictional contact of the joint not only eradicates a warped condition from the tongue, but also insures a maximum' rigidity in the assembled trame.

aving thus fully described my invention, what I claim as new and desire to secure by Letters Patent is In a Window frame, the combination with a pulley stile having a pair of parallel spaced, longitudinally extending, tongues, each of said tongues having the opposite sides thereof correspondingly tapered, thereby defining spaced wedge-shaped elements and an intermediate recess with outwardly diverging Walls, a blind stop having a pair of similarly disposed and complementary grooves therein providing, intermediately ot said grooves, a tongue interfittingly engaging said recess, said connection when compressed together affording a Weathertight joint with stresses and strains substantially equally distributed over the contacting areas ot the joint, and a fastening element extending through the wedge of t-he blind stop and recess of the pulley stile, respectively, in a perpendicular direction whereby to equalize the compressive forces relative to said tapered contacting surfaces.

In testimony whereof I alti); my signature.

HENRY G. KLOPP. 

